Every now and then a new product hits the market that just blows away all of the competition. Solar Sun Rings is just that product.
Old-fashioned Solar Covers are effective in retaining heat on swimming pools and producing some heat, but if you ask a solar cover manufacturer how much heat a solar cover produces, as we have, they will generally tell you one of three things:

They do not know

They cannot quantify it, or most amazingly of all…

They do not produce heat at all but just allow the sun to heat the pool

Well Solar Sun Rings are different. The manufacturers of Solar Sun Rings know exactly what their product does and how many BTUs it produces, possibly because it works so well. The blue layer in the Solar Sun Ring absorbs 50% of the sunlight and converts that into heat, the other 50% is allowed to pass through for deep water heating.